self unloading trailers
preferred label: تریلر خودتخلیه‌گر @fa
type: Concept
related: self loading trailers

trailers
preferred label: یدک‌کش @fa
type: Concept
narrower: self loading trailers

self loading trailers
alternative label: loader wagons
related: self unloading trailers
broader: trailers
preferred label: تریلر خودبارگیر @fa
type: Concept